Multi-stage filter

Abstract

The utility model discloses a multi-stage filter which comprises a shell, an oil inlet channel and an oil outlet channel are arranged at the upper end and the lower end of the shell respectively, a sealing cover plate, a top cover, a first filter portion, a supporting cover, a filter element structure, a bottom cover and a high-elasticity spring are sequentially arranged in the shell from top to bottom, and a first embedded groove is formed in the lower end of the top cover. The supporting cover comprises a center plate, a second embedded groove is formed in the upper end of the center plate, the first filtering part is clamped between the first embedded groove and the second embedded groove, the first filtering part comprises an inner pipe and an outer pipe, a fixing plate is arranged at the lower end of the center plate, a circulation opening is formed in the center of the fixing plate, and the inner pipe is connected with the outer pipe. The two ends of the center plate are fixedly connected with the fixing plate through connecting columns, a third embedded groove is formed in the upper end of the bottom cover, the lower end of the filter element structure is inserted into the third embedded groove, and the filter element structure comprises a center pipe and filter paper arranged on the outer side of the center pipe in a sleeving mode; according to the utility model, multi-stage filtration can be realized, and the filtration is not easy to block.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, and more specifically to a multi-stage filtering filter. Background Art

[0002] During the filtering process of the filter, once the purity filtering effect is poor, there are likely to be fine impurities, which will affect the operation of the engine of the motor vehicle. If used for a long time, it is easy to damage the equipment, and the filtering effect of the traditional equipment is poor.

[0003] In the prior art, a Chinese utility model with the publication number of CN213270101U, a diesel filter that can be filtered multiple times, is provided with a first filter element, a second filter element and a second filter screen. The diesel is first filtered through the installation groove at the bottom end of the first filter element, and then secondary filtered by the first filter screen to remove large particle impurities. The second filter screen is a fine mesh structure, which filters the diesel again, and aggregates small particles inside the second filter screen. The multi-layer filtering has a good filtering effect. However, for the horizontally arranged filter elements and filter screens, the filtered impurities will remain on the filter elements and filter screens, which is likely to cause blockage and difficult filtering. Therefore, this application proposes a multi-stage filtering filter. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-stage filtering filter, which can achieve multi-stage filtering and is not easily blocked during filtering.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A multi-stage filtering filter includes a housing. An oil inlet channel and an oil outlet channel are respectively arranged at the upper and lower ends of the housing. Inside the housing, a sealing cover plate, a top cover, a first filtering part, a support cover, a filter element structure, a bottom cover and a high-elastic spring are sequentially arranged from top to bottom. An oil inlet is communicated at the positions of the sealing cover plate and the top cover corresponding to the oil inlet channel. An inner embedding groove one is arranged at the lower end of the top cover. The support cover includes a central plate. An inner embedding groove two is arranged at the upper end of the central plate. The first filtering part is clamped between the inner embedding groove one and the inner embedding groove two. The first filtering part includes an inner pipe and an outer pipe. A plurality of first filtering holes and second filtering holes are respectively arranged on the inner pipe and the outer pipe. The upper end of the inner pipe corresponds to the oil inlet. A fixing plate is arranged at the lower end of the central plate. A circulation port is arranged at the center of the fixing plate. The two ends of the central plate are fixedly connected to the fixing plate through connecting columns. An inner embedding groove three is arranged at the upper end of the bottom cover. The lower end of the filter element structure is inserted into the inner embedding groove three. The filter element structure includes a central pipe and a filter paper sleeved outside the central pipe. The upper ends of the central pipe and the filter paper are both abutted against the fixing plate. The central pipe is communicated with the circulation port.

[0007] Adopting the above technical solutions, the utility model has the following advantages:

[0008] The arrangement of the inner tube, outer tube, central tube and filter paper in the utility model enables the medium to be filtered to pass through the inner tube, outer tube, central tube and filter paper in sequence to achieve multi-stage filtration, thereby improving the filtration effect. Moreover, the inner tube, outer tube, central tube and filter paper are all vertically arranged. Therefore, after the impurities are filtered, the impurities will fall to the lower end and accumulate, reducing the influence on the subsequent medium filtration, making the filtration not easy to be blocked, and only need to clean the impurities regularly.

[0009] Furthermore, a sealing ring groove is provided between the sealing cover plate and the top cover, and a sealing ring is embedded in the sealing ring groove.

[0010] Adopting the above technical solutions, the utility model has the following advantages:

[0011] The arrangement of the sealing ring in the utility model strengthens the sealing performance between the sealing cover plate and the top cover, and can effectively prevent the leakage of the medium.

[0012] Furthermore, the central tube is provided with a third filter hole, and the diameters of the first filter hole, the second filter hole and the third filter hole decrease in sequence.

[0013] Adopting the above technical solutions, the utility model has the following advantages:

[0014] The arrangement in the utility model that the diameters of the first filter hole, the second filter hole and the third filter hole decrease in sequence enables the impurities to be filtered in sequence according to different sizes, making the filtration more delicate and the filtration effect better.

[0015] Furthermore, an annular plate is fixedly provided at the lower end of the outer side of the inner tube, and the outer side of the annular plate abuts against the inner side of the outer tube.

[0016] Adopting the above technical solutions, the utility model has the following advantages:

[0017] The arrangement of the annular plate in the utility model plays a role in fixing the inner tube and preventing the inner tube from moving randomly in the outer tube.

[0018] Furthermore, the flow port is in the shape of a flared mouth with a larger upper part and a smaller lower part.

[0019] Adopting the above technical solutions, the utility model has the following advantages:

[0020] The flow port of the utility model is in the shape of a flared mouth with a larger upper part and a smaller lower part, enabling the filtered medium to flow into the central tube more quickly for the next step of filtration.

[0021] Furthermore, an inner embedding groove four is provided at the lower end of the bottom cover, the upper end of the high-elastic spring is clamped and fixedly connected in the inner embedding groove four, and the lower end of the high-elastic spring is fixedly connected with the lower end of the shell.

[0022] Adopting the above technical solutions, the utility model has the following advantages:

[0023] The setting of the inner groove four of the utility model plays a role in positioning the high-elastic spring.

[0024] Furthermore, the housing includes a bottom shell and a cover, and the bottom shell and the cover are fixedly connected by threaded connection.

[0025] Adopting the above technical solutions, the utility model has the following advantages:

[0026] The setting of the bottom shell and the cover of the utility model facilitates the subsequent opening of the housing, thereby realizing the repair and replacement of parts and the regular removal of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following further describes the utility model in conjunction with the drawings and embodiments.

[0028] Figure 1 It is a schematic cross-sectional structure diagram at the center of the front view of the utility model;

[0029] Figure 2 For the utility model Figure 1 The enlarged structure diagram at A in it.

[0030] Reference numerals: 1, bottom shell; 101, cover; 2, top cover; 201, inner groove one; 3, inner tube; 301, filter hole one; 302, annular plate; 4, outer tube; 401, filter hole two; 5, center plate; 501, inner groove two; 6, fixing plate; 601, flow-through port; 7, center tube; 701, filter hole three; 8, bottom cover; 801, inner groove three; 802, inner groove four; 9, high-elastic spring; 10, oil outlet channel; 11, oil inlet channel; 12, oil inlet; 13, sealing cover plate; 14, sealing ring groove; 15, sealing ring; 16, filter paper; 17, connecting column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] As Figure 1As shown, in a specific embodiment of the present invention, a multi-stage filtration filter includes a housing. An oil inlet passage 11 and an oil outlet passage 10 are respectively provided at the upper and lower ends of the housing. Inside the housing, a sealing cover plate 13, a top cover 2, a first filtration part, a support cover, a filter element structure, a bottom cover 8 and a high-elastic spring 9 are sequentially arranged from top to bottom. An oil inlet 12 is provided in communication at the positions of the sealing cover plate 13 and the top cover 2 corresponding to the oil inlet passage 11. An inner groove one 201 is provided at the lower end of the top cover 2. The support cover includes a central plate 5. An inner groove two 501 is provided at the upper end of the central plate 5. The first filtration part is clamped between the inner groove one 201 and the inner groove two 501. The first filtration part includes an inner tube 3 and an outer tube 4. A plurality of first filtration holes 301 and second filtration holes 401 are respectively provided on the inner tube 3 and the outer tube 4. The upper end of the inner tube 3 corresponds to the oil inlet 12. A fixing plate 6 is provided at the lower end of the central plate 5. A circulation port 601 is provided at the center of the fixing plate 6. Both ends of the central plate 5 are fixedly connected to the fixing plate 6 through connecting columns 17. An inner groove three 801 is provided at the upper end of the bottom cover 8. The lower end of the filter element structure is inserted into the inner groove three 801. The filter element structure includes a central tube 7 and a filter paper 16 sleeved outside the central tube 7. The upper ends of the central tube 7 and the filter paper 16 are both abutted against the fixing plate 6. The central tube 7 is in communication with the circulation port 601.

[0032] Through the above settings, the settings of the inner tube 3, the outer tube 4, the central tube 7 and the filter paper 16 in the present invention enable the medium to be filtered to sequentially pass through the inner tube 3, the outer tube 4, the central tube 7 and the filter paper 16 to achieve multi-stage filtration, thereby improving the filtration effect. Moreover, the inner tube 3, the outer tube 4, the central tube 7 and the filter paper 16 are all vertically arranged. Therefore, after the impurities are filtered, the impurities will fall to the lower end and accumulate, reducing the influence on the subsequent medium filtration, making the filtration not easily blocked, and only need to clean the impurities regularly.

[0033] As Figures 1 to 2 As shown, a sealing ring groove 14 is provided between the sealing cover plate 13 and the top cover 2, and a sealing ring 15 is embedded in the sealing ring groove 14; a third filtration hole 701 is provided on the central tube 7, and the diameters of the first filtration hole 301, the second filtration hole 401 and the third filtration hole 701 decrease in sequence; an annular plate 302 is fixedly provided at the lower end outside the inner tube 3, and the outside of the annular plate 302 abuts against the inside of the outer tube 4; the circulation port 601 is in the shape of a flared mouth with a larger upper part and a smaller lower part; an inner groove four 802 is provided at the lower end of the bottom cover 8, and the upper end of the high-elastic spring 9 is clamped and fixedly connected in the inner groove four 802, and the lower end of the high-elastic spring 9 is fixedly connected to the lower end of the housing; the housing includes a bottom shell 1 and a sealing cover 101, and the bottom shell 1 and the sealing cover 101 are fixedly connected by threaded connection.

[0034] With the above settings, the sealing ring 15 of the utility model strengthens the sealing performance between the sealing cover plate 13 and the top cover, effectively preventing medium leakage; the settings of the first filter hole 301, the second filter hole 401 and the third filter hole 701 of the utility model with gradually decreasing diameters enable impurities to be filtered successively according to different sizes, making the filtration more refined and the filtration effect better; the setting of the annular plate 302 of the utility model plays a role in fixing the inner tube 3 and preventing the inner tube 3 from moving randomly within the outer tube 4; the flow port 601 of the utility model is in the shape of a flared opening with a larger upper part and a smaller lower part, enabling the filtered medium to flow into the central tube 7 more quickly for the next step of filtration; the setting of the fourth embedded groove 802 of the utility model plays a role in positioning the high elastic spring 9; the settings of the bottom shell 1 and the cover 101 of the utility model facilitate the subsequent opening of the shell, thereby realizing the maintenance and replacement of components and the regular removal of impurities.

[0035] Working principle: During use, the medium enters the inner tube 3 through the oil inlet channel 11 and the oil inlet 12, and the first filtration is achieved through the first filter hole 301. Then it enters the outer tube 4, and the second filtration is achieved through the second filter hole 401. The filtered medium flows into the central tube 7 through the flow port 601, and the third filtration is achieved through the third filter hole 701. Finally, the final filtration is achieved through the filter paper 16 and then discharged through the oil outlet channel 10, thus realizing the multi-stage filtration of the medium. Moreover, the impurities filtered in the inner tube 3, the outer tube 4 and the central tube 7 will move downward and accumulate at the lower end, reducing the blockage of the first filter hole 301, the second filter hole 401 and the third filter hole 701, effectively preventing the medium from being difficult to filter. It only needs to regularly remove the filter and take out the components for cleaning.

[0036] The above is only the preferred embodiment of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions within the idea of the utility model belong to the protection scope of the utility model. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. A multi-stage filter, comprising a housing, wherein the upper and lower ends of the housing are respectively provided with an oil inlet channel (11) and an oil outlet channel (10), characterized in that: The housing is provided with a sealing cover plate (13), a top cover (2), a filter part (1), a support cover, a filter element structure, a bottom cover (8) and a high-elastic spring (9) in sequence from top to bottom; the sealing cover plate (13) and the top cover (2) are connected to each other at positions corresponding to the oil inlet passage (11) and are provided with an oil inlet (12); the top cover (2) is provided with an embedded groove (1) (201) at the lower end; the support cover comprises a center plate (5); the center plate (5) is provided with an embedded groove (2) (501) at the upper end; the filter part (1) is clamped between the embedded groove (1) (201) and the embedded groove (501); the filter part (1) comprises an inner tube (3) and an outer tube (4); the inner tube (3) and the outer tube (4) are respectively provided with a plurality of filter holes (301); 1) and filter hole two (401), the upper end of the inner tube (3) corresponds to the oil inlet (12), the lower end of the center plate (5) is provided with a fixed plate (6), the center of the fixed plate (6) is provided with a flow port (601), both ends of the center plate (5) are fixedly connected to the fixed plate (6) through connecting columns (17), the upper end of the bottom cover (8) is provided with an embedded groove three (801), the lower end of the filter element structure is inserted into the embedded groove three (801), the filter element structure comprises a center tube (7) and a filter paper (16) sleeved on the outer side of the center tube (7), the upper ends of the center tube (7) and the filter paper (16) are both against the fixed plate (6), and the center tube (7) is in communication with the flow port (601).

2. A multi-stage filter according to claim 1, characterized in that: A sealing ring groove (14) is provided between the sealing cover plate (13) and the top cover (2), and a sealing ring (15) is embedded in the sealing ring groove (14).

3. The multi-stage filter according to claim 1, characterized in that: The central tube (7) is provided with a third filter hole (701), and the diameters of the first filter hole (301), the second filter hole (401) and the third filter hole (701) decrease in sequence.

4. The multi-stage filter according to claim 1, characterized in that: An annular plate (302) is fixedly provided at the lower end of the outer side of the inner tube (3), and the outer side of the annular plate (302) abuts against the inner side of the outer tube (4).

5. The multi-stage filter according to claim 1, characterized in that: The flow opening (601) is in the shape of a trumpet with a larger top and a smaller bottom.

6. The multi-stage filter according to claim 1, characterized in that: The lower end of the bottom cover (8) is provided with an embedded groove four (802), the upper end of the high-elasticity spring (9) is clamped in the embedded groove four (802) and fixedly connected, and the lower end of the high-elasticity spring (9) is fixedly connected to the lower end of the shell.

7. The multi-stage filter according to claim 6, characterized in that: The housing comprises a bottom shell (1) and a cover (101), and the bottom shell (1) and the cover (101) are fixed by threaded connection.

Images